67 results about "Metal absorption" patented technology

A medium protecting layer is added to the outermost layer of ordinary low-radiation coated glass to serve as an enhanced protecting layer so that the ordinary low-radiation coated glass has high chemical stability, abrasion resistance and oxidation resistance and low friction coefficient and particularly improves scratch resistance, toughened low-radiation coated glass is convenient and simple to transport and process, and the finished product rate of production is greatly improved. In particular, the lowered processing requirements enable more small glass deep-processing enterprises to produce the low-radiation coated glass, and a foundation is established for popularization of environment-friendly energy-saving products. In addition, a metal absorbing layer is first coated on the glass, reflectivity of coated products can be greatly reduced, the problem of light pollution of the toughened low-radiation coated glass with low light transmittance is solved, and the toughened low-radiation coated glass products can meet the requirements of the market at present.

The invention belongs to the field of photoelectric detection and sensing technology, and proposes an infrared detector based on hybrid plasmon resonance enhancement to solve the problems that the preparation cost of the metal absorption-based photodetector in the prior art is high, the light absorption is not high, and the absorption band modulation is difficult. A composite structure of a metalmicro-nano hole array layer / semiconductor film / metal film is used for constructing the infrared detector based on hybrid plasmon resonance enhancemen; local plasmon resonance of the top metal micro-nano hole array, surface plasmons of the bottom layer metal film, and hybrid plasmon resonance formed by coupling the local plasmon resonance and the surface plasmons are extracted to greatly increase the absorption of incident light by the metal; the hot carriers generated by light absorption by the upper and lower layers of metal are injected into the intermediate semiconductor layer so that considerable optical responsivity is obtained; and tunable spectral absorption from near infrared to mid infrared can be achieved by adjusting the period and diameter of the top layer micro-nano holes, andthe thickness and refractive index of the intermediate semiconductor layer.

The present invention discloses a visible near-infrared ultra-broadband absorber and its preparation method, comprising a substrate and a five-layer optical film, wherein the bottom film is a bottom metal absorbing layer; a top germanium layer is provided on the top of the bottom metal absorbing layer; and remaining three layers are provided on the top of the top germanium layer with gradually decreasing refractive indexes from the bottom to the top. The present invention is based on the blocking effect of the metal absorbing layer and broadband anti-reflection film stack of the germanium layer, which has realized visible near-infrared ultra-broadband absorption with high efficiency and good angle insensitivity, and has fully surpassed traditional absorbers in terms of performances. Compared with conventional broadband absorbers and artificial electromagnetic absorbers proposed in recent years, the compact multilayer film structure in the present invention is simpler and avoides complicated nano-fabrication techniques. Therefore, it can significantly reduce production cost and shorten the production cycle, and is thus suitable for large-scale mass production.

The invention relates to a DGT (diffusive gradients in thin films) technology suitable for extraction of unsaturated active-state soil elements. Equipment for the technology comprises a sampler, a round base, a diffusion support network and a sealing cover, wherein the cylindrical diffusion support network is coaxially and fixedly mounted on the round base; the sealing cover is coaxially embeddedinto the upper part of the diffusion support network in a sealed manner; a diffusion film is coaxially applied to the inner edge of the diffusion support network; a pressure valve plate is coaxially mounted on the inner edge of the diffusion film of the diffusion support network in a sliding manner; a compression spring is mounted between the pressure valve plate and the sealing cover; the diffusion film between the pressure valve plate and the base is filled with heavy metal absorbing gel. According to the DGT, two gradients including inorganic element and water can be provided, so that heavymetal in upland soil can be adsorbed in site, accuracy of a detection result is greatly improved, monitoring cost is reduced, and the defect that original DGT cannot be used under the water shortagecondition is overcome.

The invention provides an energy absorber comprising a dielectric optical waveguide which is used for transmitting photons; and a metal wrapping layer which comprises a metal absorption structure in which the metal layer completely wraps the dielectric optical waveguide.

The invention relates to a method for disproportionation and transalkylation of toluene heavy aromatics and mainly solves the problems that aromatic ring loss rate is high, reaction hydrogen consumption is high and the like during reaction in the prior art. Catalyst used in the method includes: (a) at least one of platinum or palladium metals; and (b) at least one of ZSM-12, mordenite and zeolite. The catalyst is preprocessed in a way that the catalyst is contacted with sulfur compounds at 200-600 DEG C to allow sulfur content of the catalyst to be not larger than metal absorption saturation value. The problems that aromatic ring loss rate is high, reaction hydrogen consumption is high and the like are solved. The method is applicable to industrial production of disproportionation and transalkylation of toluene heavy aromatics.

The invention discloses an integrally-designed CPT (Coherent Population Trapping) atomic frequency scale physical system which comprises an assembly laser tube (1), an optical assembly, an absorption cell (7), a hot ring (5) and a C-field coil (8), an optoelectroulc module and a heating thermostat, wherein a laser tube sleeve (2) is rotatably assembled in an assembling hole of the hot ring (5), the laser tube (1) and the optical assembly behind the laser tube are fixed in a step assembling hole of the hot ring (5) through the laser tube sleeve (2), the C-field coil (8) directly wound on the absorption cell (7) and the absorption cell (7) are assembled on a metal absorption cell sleeve (9) with a magnetic permeability of more than 2000, and the absorption cell sleeve (9) is coaxially coupled and connected to the back of the optical assembly through the assembling hole of the non-magnetic conductor hot ring (5). Through the integrated design, the laser tube and the absorption cell are subjected to temperature control simultaneously, thus the defect of the design that the laser tube and the absorption cell are divided into two parts and respectively subjected to the temperature control in the prior art is eliminated, the volume of the physical system and the power consumption of the physical system are reduced.

The invention relates to Group 1 metal / silica gel compositions comprising silica gel and an alkali metal or an alkali metal alloy. The compositions of the inventions are described as Stage 0, I, II, and III materials. These materials differ in their preparation and chemical reactivity. Each successive stage may be prepared directly using the methods described below or from an earlier stage material. Stage 0 materials may, for example, be prepared using liquid alloys of Na and K which are rapidly absorbed by silica gel (porous Si02) under isothermal conditions, preferably at or just above room temperature, to form loose black powders that retain much of the reducing ability of the parent metals. When the low melting Group 1 metals are absorbed into the silica gel, a mild exothermic reaction produces Stage I material, loose black powders that are indefinitely stable in dry air. Subsequent heating to 400 DEG C produces Stage II materials, which are also loose black powders. Further heating above 400 DEG C forms Stage III material with release of some Group 1 metal. It is believed that Stage I, II and III materials represent reductions of the silica gel after absorption of the Group 1 metal. Preferred Group 1 metal / silica gel compositions of the invention are those containing sodium, potassium, or sodium-potassium alloys with sodium and sodium- potassium alloys being most preferred. Each stage of the Group 1 metal / silica gel composition of the invention may be used as a reducing agent reacting with a number of reducible organic materials in the same manner known for alkali metals and their alloys.